Dermatocarpon americanum

Species of fungus

Dermatocarpon americanum, the American stippleback lichen, is a silvery-gray, leafy (foliose) lichen with black dots that is common on near seeps in rock faces from southwestern North American deserts to coastal areas. It has a silvery-dusty looking coating. It is common in deserts on vertical rock surfaces that are partially shade protected near seepages.

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